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SA2004 Test conditions: Vout= 5V Iout =50Amp 0-5KGauss

SA2004 Test conditions: Vout= 5V Iout =50Amp 0-5KGauss. Setup. SASY2000. Vout. Vset. CHon. To the load. SASY2000. EXTERNAL PWR48. SASY. Address. Communications. +. 48V sig. PWR 48V IN. -. Fuse. Earth. SY2527. 48V sig. Communications. Instruments:.

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SA2004 Test conditions: Vout= 5V Iout =50Amp 0-5KGauss

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  1. SA2004 Test conditions:Vout= 5VIout =50Amp 0-5KGauss

  2. Setup

  3. SASY2000 Vout Vset CHon To the load

  4. SASY2000

  5. EXTERNAL PWR48 SASY Address Communications + 48V sig. PWR 48V IN - Fuse Earth

  6. SY2527 . 48V sig. Communications

  7. Instruments: -n°1 48V LAMBDA JWS600 Power supply -n°1 Branch Controller -n°1 80V 50A 400W/CH MAX Active load -n°1 Oscilloscope TEKTRONIX YHS720P -n°1 Rshunt 20Amp 10mOhm -n°1 Rshunt 50amp 50mV -n°1 SASY -n°1 System SY2527 -n°1 Tester Goldstar DM-332

  8. Waveform across the transfomer primary 60V 0KGauss 1KGauss 2KGauss 20V/Div 0 1usec/Div -60V 3KGauss 4KGauss 5KGauss

  9. 0KGauss 1KGauss 2KGauss 26.4A 23A 20A 0 33A/Div 1usec/Div 40A 34A 33A 3KGauss 4KGauss 5KGauss Current absorbed by the primary’s power supply, measured on a 33 mOhm load

  10. Effect • Reduction of the dead time on the transformer drive. • Increment of the absorbed current. • Cause • Reduction of the magnetization inductance • Increment of the dissipated inductance

  11. Vrin: drop over the 10 mOhm shunt resistance in series to the Pwr 48VIin-Choff: current absorbed by the SASY with the channel offVinSASY: Pwr 48VPin: power absorbed by the SASY with the channel off Iin-Chon: current absorbed by the SASY with the channel on IinCH: current absorbed by the channel (IinChon-IinChoff)VinCH: channel input voltage Pi-CH: power provided by the Pwr 48V with the channel on Vout: channel output voltage Iout: current provided by the channel Po-CH: power over the loadPo/Pi%: percentage efficiency of the channel

  12. Conclusions The channels have behaved as foreseen during the project phase, this is the reason why components which could stand a larger current stress have been chosen. Proposals According to the data resulting from these tests, CAEN Power Supply is realizing the revisions of the tested boards in order to improve their performance in magnetic field

  13. Acknowledgements: For the test runs we wish to thank the following people: G. Stefanini , S. De Pasquale, F. Cindolo (ALICE) L. Periale (CERN ESS-EP)

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